I've hunted for these locally in Australia with no luck. Does
anyone know where I can buy them online? I want to buy a few to
make sure I'm always ready and can slip them in cartridge style - I
have my first wedding coming up in a couple of months and want to
be prepared.

cheers

I just rang Hanimex and they posted one down to me in Melbourne, $33 inc postage. As you live in Sin city you could probably pop round the corner and pick one up.
--
eric burrows